Marcus Cowper studied Medieval History at the universities of Manchester and Birmingham. He specialised in High and Late Medieval Church history, and received his postgraduate degree for a study on the impact of heresy in the locality. He has edited Osprey military history books for over seven years and is one of the editors responsible for the creation of the Fortress series.

Peter Dennis was born in 1950. Inspired by contemporary magazines such as Look and Learn he studied illustration at Liverpool Art College. Peter has since contributed to hundreds of books, predominantly on historical subjects. He is a keen wargamer and modelmaker. He is based in Nottinghamshire, UK
Peter Dennis was inspired by contemporary magazines such as Look and Learn, leading him to study Illustration at Liverpool Art College. Peter has since contributed to hundreds of books, predominantly on historical subjects, including many Osprey titles. A keen wargamer and modelmaker, he is based in Nottinghamshire, UK.